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三峡库区消落带土壤对Cu(Ⅱ)、Zn(Ⅱ)的吸附特征

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朱强, 王素梅, 胡红青, 万成炎, 胡莲, 张自永. 三峡库区消落带土壤对Cu(Ⅱ)、Zn(Ⅱ)的吸附特征[J]. 环境化学, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
引用本文: 朱强, 王素梅, 胡红青, 万成炎, 胡莲, 张自永. 三峡库区消落带土壤对Cu(Ⅱ)、Zn(Ⅱ)的吸附特征[J]. 环境化学, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
shu
ZHU Qiang, WANG Sumei, HU Hongqing, WAN Chengyan, HU Lian, ZHANG Ziyong. Adsorption of Cu(Ⅱ), Zn(Ⅱ) by the purple soils in water-level-fluctuating belt of the Three-Gorge-Reservoir region[J]. Environmental Chemistry, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
Citation: ZHU Qiang, WANG Sumei, HU Hongqing, WAN Chengyan, HU Lian, ZHANG Ziyong. Adsorption of Cu(Ⅱ), Zn(Ⅱ) by the purple soils in water-level-fluctuating belt of the Three-Gorge-Reservoir region[J]. Environmental Chemistry, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
shu

三峡库区消落带土壤对Cu(Ⅱ)、Zn(Ⅱ)的吸附特征

  • 1.

    华中农业大学资源与环境学院, 武汉, 430070;

  • 2.

    水利部中国科学院水工程生态研究所, 武汉, 430079

  • 基金项目:

    国家水体污染控制与治理科技重大专项(2009ZX07104-003)资助.

Adsorption of Cu(Ⅱ), Zn(Ⅱ) by the purple soils in water-level-fluctuating belt of the Three-Gorge-Reservoir region

  • 1.

    College of Resource and Environment, Huazhong Agricultural University, Wuhan, 430070, China;

  • 2.

    Institute of Hydroecology, Chinese Academy of Sciences, Wuhan, 430079, China

  • Fund Project:

  • 摘要: 以三峡库区消落带紫色土为对象,采用平衡吸附法研究了Cu(Ⅱ)、Zn(Ⅱ)在紫色土中的吸附特征,分析了紫色土对重金属的吸附能力.结果表明:(1)随着加入Cu(Ⅱ)、Zn(Ⅱ)浓度增高,紫色土对Cu(Ⅱ)、Zn(Ⅱ)的吸附量增大,碱性紫色土对Cu(Ⅱ)、Zn(Ⅱ)的吸附量最高分别为1499.5 mg·kg-1、2845.4 mg·kg-1;(2)土壤中有Cu(Ⅱ)、Zn(Ⅱ)的专性吸附位点,在两者共存的条件下存在竞争吸附,Cu(Ⅱ)的竞争吸附能力大于Zn(Ⅱ),其各自的最大吸附量小于单一离子条件下的吸附量,碱性、中性、酸性紫色土Cu(Ⅱ)最大吸附量的下降幅度分别是14.5%、15.2%、15.9%,Zn(Ⅱ)的最大吸附量下降幅度分别为31.7%、28.1%、25.7%;(3)共存阳离子类型及浓度影响紫色土有效Cu(Ⅱ)、Zn(Ⅱ)含量,随着阳离子的加入,碱性紫色土的有效Cu(Ⅱ)含量增加,酸性紫色土减少,而3种紫色土的有效Zn(Ⅱ)含量均增加.消落带土壤淹水后,水体中Cu(Ⅱ)及其他阳离子的存在使土壤对Zn(Ⅱ)的吸附力降低,造成Zn(Ⅱ)污染的环境风险增加.
    Abstract: By batch adsorption method, Cu(Ⅱ) and Zn(Ⅱ) adsorption by the purple soils in water-level-fluctuating belt of the Three Gorges Reservoir area, and the effect of different cations on available heavy metals' content were studied. The results showed that as the concentrations of Cu(Ⅱ) and Zn(Ⅱ) in solution increased, the amount of Cu(Ⅱ) and Zn(Ⅱ) adsorbed by the three purple soils increased. The maximum amount of Cu(Ⅱ) and Zn(Ⅱ) adsorbed by the alkaline soil were the highest among the three soils, reaching 1499.5 mg·kg-1 and 2845.4 mg·kg-1 respectively; There are specific adsorption sites for Cu(Ⅱ) and Zn(Ⅱ) in the soils. Under the condition of coexisting Cu(Ⅱ) and Zn(Ⅱ), there is adsorption competition between them, and the adsorption ability is Cu(Ⅱ)>Zn(Ⅱ). The maximum adsorption capacity of each metal ions is less than that of the single ion. The maximum amount of Cu(Ⅱ) adsorbed by alkaline, neutral, and acid soil decreased by 14.5%, 15.2%, 15.9%, and by 31.7%, 28.1%, 25.7% for Zn(Ⅱ). The content of available Cu(Ⅱ) and Zn(Ⅱ) in the purple soil was affected by the types and concentrations of cations. The addition of cations leads to an increase of available Cu(Ⅱ) content in alkaline purple soil but a decrease in the acid and neutral purple soil. It leads to a decrease of the available Zn(Ⅱ) in all the three purple soils. In the looded soil, the existence of Cu(Ⅱ) and other cations in the cover water would decrease the adsorption ability of soil for Zn(Ⅱ) and increase the risk of Zn pollution.
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  • 收稿日期:  2012-10-30
朱强, 王素梅, 胡红青, 万成炎, 胡莲, 张自永. 三峡库区消落带土壤对Cu(Ⅱ)、Zn(Ⅱ)的吸附特征[J]. 环境化学, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
引用本文: 朱强, 王素梅, 胡红青, 万成炎, 胡莲, 张自永. 三峡库区消落带土壤对Cu(Ⅱ)、Zn(Ⅱ)的吸附特征[J]. 环境化学, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
shu
ZHU Qiang, WANG Sumei, HU Hongqing, WAN Chengyan, HU Lian, ZHANG Ziyong. Adsorption of Cu(Ⅱ), Zn(Ⅱ) by the purple soils in water-level-fluctuating belt of the Three-Gorge-Reservoir region[J]. Environmental Chemistry, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
Citation: ZHU Qiang, WANG Sumei, HU Hongqing, WAN Chengyan, HU Lian, ZHANG Ziyong. Adsorption of Cu(Ⅱ), Zn(Ⅱ) by the purple soils in water-level-fluctuating belt of the Three-Gorge-Reservoir region[J]. Environmental Chemistry, 2013, 32(8): 1456-1462. doi: 10.7524/j.issn.0254-6108.2013.08.005
shu

三峡库区消落带土壤对Cu(Ⅱ)、Zn(Ⅱ)的吸附特征

  • 1.  华中农业大学资源与环境学院, 武汉, 430070;
  • 2.  水利部中国科学院水工程生态研究所, 武汉, 430079
  • 收稿日期:  2012-10-30
基金项目:

国家水体污染控制与治理科技重大专项(2009ZX07104-003)资助.

摘要: 以三峡库区消落带紫色土为对象,采用平衡吸附法研究了Cu(Ⅱ)、Zn(Ⅱ)在紫色土中的吸附特征,分析了紫色土对重金属的吸附能力.结果表明:(1)随着加入Cu(Ⅱ)、Zn(Ⅱ)浓度增高,紫色土对Cu(Ⅱ)、Zn(Ⅱ)的吸附量增大,碱性紫色土对Cu(Ⅱ)、Zn(Ⅱ)的吸附量最高分别为1499.5 mg·kg-1、2845.4 mg·kg-1;(2)土壤中有Cu(Ⅱ)、Zn(Ⅱ)的专性吸附位点,在两者共存的条件下存在竞争吸附,Cu(Ⅱ)的竞争吸附能力大于Zn(Ⅱ),其各自的最大吸附量小于单一离子条件下的吸附量,碱性、中性、酸性紫色土Cu(Ⅱ)最大吸附量的下降幅度分别是14.5%、15.2%、15.9%,Zn(Ⅱ)的最大吸附量下降幅度分别为31.7%、28.1%、25.7%;(3)共存阳离子类型及浓度影响紫色土有效Cu(Ⅱ)、Zn(Ⅱ)含量,随着阳离子的加入,碱性紫色土的有效Cu(Ⅱ)含量增加,酸性紫色土减少,而3种紫色土的有效Zn(Ⅱ)含量均增加.消落带土壤淹水后,水体中Cu(Ⅱ)及其他阳离子的存在使土壤对Zn(Ⅱ)的吸附力降低,造成Zn(Ⅱ)污染的环境风险增加.

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